2. overlay, overspread, envelop, enwrap. 6. cloak, conceal. 11. counterbalance, compensate for. 37, 38. Cover,protection,screen,shelter mean a defense against harm or danger and a provision for safety. The main idea in cover is that of concealment, as in darkness, in a wood, or behind something: The ground troops were left without cover when the air force was withdrawn.Screen refers especially to something behind which one can hide: A heavy fire formed a screen for ground operations.Protection and shelter emphasize the idea of a guard or defense, a shield against injury or death. A protection is any such shield: In World War II, an air cover of airplanes served as a protection for troops. A shelter is something that covers over and acts as a place of refuge: An abandoned monastery acted as a shelter.

mid-12c., from Old French covrir (12c., Modern French couvrir) "to cover, protect, conceal, dissemble," from Late Latin coperire, from Latin cooperire "to cover over, overwhelm, bury," from com-, intensive prefix (see com-), + operire "to close, cover" (see weir). Related: Covered; covering. Military sense is from 1680s; newspaper sense first recorded 1893; use in football dates from 1907. Betting sense is 1857. OF horses, as a euphemism for "copulate" it dates from 1530s. Covered wagon attested from 1745.

n.

early 13c., in compounds, from cover (v.). Meaning "recording of a song already recorded by another" is 1966. Cover girl is U.S. slang from 1915, shortening of magazine-cover girl.